package com.ruoyi.web.controller.common;

import java.io.File;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.ruoyi.common.core.domain.Progress;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import com.ruoyi.common.config.RuoYiConfig;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.core.domain.AjaxResult;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.file.FileUploadUtils;
import com.ruoyi.common.utils.file.FileUtils;
import com.ruoyi.framework.config.ServerConfig;

/**
 * 通用请求处理
 *
 * @author ruoyi
 */
@Api("通用请求处理")
@RestController
@RequestMapping("/common")
public class CommonController {
    private static final Logger log = LoggerFactory.getLogger(CommonController.class);

    @Autowired
    private ServerConfig serverConfig;

    private static final String FILE_DELIMETER = ",";

    /**
     * 通用下载请求
     *
     * @param fileName 文件名称
     * @param delete   是否删除
     * @param filePath 文件路径
     */
    @ApiOperation("通用下载请求")
    @GetMapping("/download")
    public void fileDownload(String fileName, Boolean delete, HttpServletResponse response, String filePath) {
        try {
            if (!FileUtils.checkAllowDownload(fileName)) {
                throw new Exception(StringUtils.format("文件名称({})非法，不允许下载。 ", fileName));
            }
            String realFileName = System.currentTimeMillis() + fileName.substring(fileName.indexOf("_") + 1);
            if (StringUtils.isEmpty(filePath)) {
                filePath = RuoYiConfig.getDownloadPath() + fileName;
            }
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, realFileName);
            FileUtils.writeBytes(filePath, response.getOutputStream());
            if (delete) {
                FileUtils.deleteFile(filePath);
            }
        } catch (Exception e) {
            log.error("下载文件失败", e);
        }
    }

    /**
     * 通用上传请求（单个）
     */
    @ApiOperation("通用上传请求（单个）")
    @PostMapping("/upload")
    public AjaxResult uploadFile(MultipartFile file, String filePath) throws Exception {
        try {
            // 上传文件路径
            if (StringUtils.isEmpty(filePath)) {
                filePath = RuoYiConfig.getUploadPath();
            }
            // 上传并返回新文件名称
            String fileName = FileUploadUtils.upload(filePath, file);
            String url = serverConfig.getUrl() + fileName;
            AjaxResult ajax = AjaxResult.success();
            ajax.put("url", url);
            ajax.put("fileName", fileName);
            ajax.put("newFileName", FileUtils.getName(fileName));
            ajax.put("originalFilename", file.getOriginalFilename());
            return ajax;
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 通用上传请求（单个）
     */
    @ApiOperation("通用上传请求（单个）")
    @PostMapping("/upload2")
    public AjaxResult uploadFile2(MultipartFile file, String filePath) throws Exception {
        try {
            // 上传文件路径
            File desc = new File(filePath);
            if (!desc.exists()) {
                if (!desc.getParentFile().exists()) {
                    desc.getParentFile().mkdirs();
                }
            }
            // 上传并返回新文件名称
            file.transferTo(Paths.get(filePath));
            return AjaxResult.success();
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 通用上传请求（多个）
     */
    @ApiOperation("通用上传请求（多个）")
    @PostMapping("/uploads")
    public AjaxResult uploadFiles(List<MultipartFile> files) throws Exception {
        try {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            List<String> urls = new ArrayList<String>();
            List<String> fileNames = new ArrayList<String>();
            List<String> newFileNames = new ArrayList<String>();
            List<String> originalFilenames = new ArrayList<String>();
            for (MultipartFile file : files) {
                // 上传并返回新文件名称
                String fileName = FileUploadUtils.upload(filePath, file);
                String url = serverConfig.getUrl() + fileName;
                urls.add(url);
                fileNames.add(fileName);
                newFileNames.add(FileUtils.getName(fileName));
                originalFilenames.add(file.getOriginalFilename());
            }
            AjaxResult ajax = AjaxResult.success();
            ajax.put("urls", StringUtils.join(urls, FILE_DELIMETER));
            ajax.put("fileNames", StringUtils.join(fileNames, FILE_DELIMETER));
            ajax.put("newFileNames", StringUtils.join(newFileNames, FILE_DELIMETER));
            ajax.put("originalFilenames", StringUtils.join(originalFilenames, FILE_DELIMETER));
            return ajax;
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 本地资源通用下载
     */
    @ApiOperation("本地资源通用下载")
    @GetMapping("/download/resource")
    public void resourceDownload(String resource, HttpServletRequest request, HttpServletResponse response) throws Exception {
        try {
            if (!FileUtils.checkAllowDownload(resource)) {
                throw new Exception(StringUtils.format("资源文件({})非法，不允许下载。 ", resource));
            }
            // 本地资源路径
            String localPath = RuoYiConfig.getProfile();
            // 数据库资源地址
            String downloadPath = localPath + StringUtils.substringAfter(resource, Constants.RESOURCE_PREFIX);
            // 下载名称
            String downloadName = StringUtils.substringAfterLast(downloadPath, "/");
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, downloadName);
            FileUtils.writeBytes(downloadPath, response.getOutputStream());
        } catch (Exception e) {
            log.error("下载文件失败", e);
        }
    }

    @ApiOperation("文件上传进度查询")
    @ResponseBody
    @RequestMapping("/getInfo")
    public Map<String, Object> getUploadInfo(HttpServletRequest request, HttpServletResponse response) {
        Map<String, Object> result = new HashMap<>();
        //禁止浏览器缓存
        response.setHeader("Cache-Control", "no-store");
        response.setHeader("Pragrma", "no-cache");
        response.setDateHeader("Expires", 0);
        //从session中读取上传信息
        Progress status = (Progress) request.getSession(true).getAttribute("status");
        if (status == null) {
            result.put("error", "没发现上传文件!");
            return result;
        }
        //上传开始时间
        long startTime = status.getStartTime();
        //现在时间
        long currentTime = System.currentTimeMillis();
        //已经传顺的时间 单位：s
        long time = (currentTime - startTime) / 1000 + 1;
        //传输速度：byte/s
        double velocity = status.getBytesRead() / time;
        //估计总时间
        double totalTime = status.getContentLength() / velocity;
        //估计剩余时间
        double timeLeft = totalTime - time;
        //百分比
        int percent = (int) (100 * (double) status.getBytesRead() / (double) status.getContentLength());
        //已完成数
        double length = status.getBytesRead() / 1024 / 1024;
        //总长度  M
        double totalLength = status.getContentLength() / 1024 / 1024;
        result.put("startTime", startTime);
        result.put("currentTime", currentTime);
        result.put("time", time);
        result.put("velocity", velocity);
        result.put("totalTime", totalTime);
        result.put("timeLeft", timeLeft);
        result.put("percent", percent);
        result.put("length", length);
        result.put("totalLength", totalLength);
        return result;
    }
}
